标题： 脉冲星J2016$+$3711在超新星遗迹CTB 87中的发现与计时使用FAST 显示英文标题

标题： Discovery and timing of pulsar J2016$+$3711 in supernova remnant CTB 87 with FAST

摘要： 我们报告在超新星遗迹（SNR）CTB 87中发现射电脉冲星PSR J2016$+$3711，脉冲的显著性为$\sim10.8\sigma$，这证实了CTB 87中X射线点源的致密性质。 这是首次使用五百米口径球面射电望远镜（FAST）在SNRs中发现脉冲星。 其积分射电脉冲轮廓可以用一个组分很好地描述，峰值通量密度50%处的宽度约为28.1$^\circ$，有效宽度约为32.2$^\circ$。 在1.25 GHz处的平均通量密度估计约为15.5$\mu$Jy。 结合在较低频率下未检测到射电脉冲，该脉冲星的射电光谱指数被限制为$\lesssim 2.3$。 我们还基于28次后续FAST观测给出了定时解。 我们的结果揭示了一个周期为50.81毫秒，周期导数为$7.2\times 10^{-14}$秒秒$^{-1}$，色散测量值为428 pc cm$^{-3}$。 赤道表面磁偶极磁场的强度被推断约为$1.9\times10^{12}$高斯。 使用从射电观测中获得的星历表，我们搜索了费米- LAT数据中的伽马射线脉动，但未检测到脉冲信号。 我们还使用FAST对伽马射线双星HESS J1832$-$093附近与SNR G22.7$-$00.2相邻的X射线对应体进行了射电脉冲搜索，但未发现信号。 显示英文摘要

摘要： We report on our discovery of the radio pulsar, PSR J2016$+$3711, in supernova remnant (SNR) CTB 87, with a $\sim10.8\sigma$ significance of pulses, which confirms the compact nature of the X-ray point source in CTB 87. It is the first pulsar discovered in SNRs using Five-hundred-meter Aperture Spherical radio Telescope (FAST). Its integrated radio pulse profile can be well described by a single component, with a width at 50% of the peak flux density of about 28.1$^\circ$ and an effective width of about 32.2$^\circ$. The mean flux density at 1.25 GHz is estimated to be about 15.5$\mu$Jy. Combined with the non-detection of the radio pulse at lower frequencies, the radio spectral index of the pulsar is constrained to be $\lesssim 2.3$. We also present the timing solution based on 28 follow-up FAST observations. Our results reveal a period of 50.81 ms, period derivative of $7.2\times 10^{-14}$ s s$^{-1}$, and dispersion measure of 428 pc cm$^{-3}$. The strength of the equatorial surface magnetic dipole magnetic field is inferred to be about $1.9\times10^{12}$ G. Using the ephemeris obtained from the radio observations, we searched Fermi-LAT data for gamma-ray pulsations but detected no pulsed signal. We also searched for radio pulses with FAST toward the X-ray counterpart of the gamma-ray binary HESS J1832$-$093 proximate to SNR G22.7$-$00.2 but found no signal.